Power-operated trip for excavator scoops



June 24, 1930.

G. E. WAGNER ET AL POWER OPERATED TRIP FOR EXCAVATOR SCOOPS Fild March18. 1927 2 Sheets-Sheet 1 \INVENT'ORS.

ATTORNEYS June 24, 1930. E, WAGNER El AL 1,765,893

YOWER OPERATED TRIP FOR EXCAVATOR SCbOPS Filed March 18, 1927 2Sheets-Sheet 2 INVEYNTORJ. EEUREE E \/\/A[;NER BY LERuY F' ELuTTER a YATTIORNEYX Patented June 24, 1930 Y nit I GEORGE E. wnen-nn onaxnoiw,oi-rro, AND LE not 1 GLUTTEB, or ,nnnn L on, .rnnnsy vamaassrenons, BYMnsnn ASSIGNMENTS, T GLUTTER-WAGNER, 1nd,}

" VA ooRPonArroN 030E10- rownngornaaran brain son EXGAVATOR sooor's rApplication filed March is,

This invention relates'to' power operated trips for excavator scoops.

Heretofore, many different types of mev chan'ical, electrical andpower-operated trips have been devised. These, however have not beenentirely successful, the mechan cal trips being not agreat 'deal moreefficient 7 than the ordinary handrope trlp; the elec driven fromitheprime mover of the excavator, being not sufliciently positive tofunction properly at all times and under all conditions of service;

The resent invention has for its general objectt e provision of animproved poweroperate dtrip controlled from the station of the singleexcavator operative and positively operable from the drive shaftof theexcavator so asto always trip the scoop at the desired instant. I p IParticularly the invention has for an object the provision ofpower-operated means for producing a predetermined positive travel ofthe trip rope within definitely defined limits. I Y Anotherparticularobject is the provision ofa combined friction andpositive'clu'tch' for operating the "trip" line actuating drum which mayhave attached thereto the usual retrievin spring or weights to maintainthe trip line, taut. I

Another object is to provide in combination 'withtheabove clutch,automatic means for positively disengagingtheclutch after it has rotatedthe drum through the required v angle to obtain the required travel Gramtrip' line. I I

' A further object of the invention is to provide in combination withthe clutch,

' "means for retrieving the same to its original The foregoing and otherobjects are obtained by the construction of a power trip as shown in theaccompanying drawings and described below. it is to be understood thatsecured at one end to bracket 30 and at. the other end to drum 27, isarranged to be 1927. Serial No. 176,434.

the invention" is not limited to the specific.

form thereof shown and described.

Of the accompanying drawings, Figure 1 is a side elevation of an excavaetor having the improved trip mounted therein; j r w s V I t Figure 2 isa longitudinal section through the power trip device on line 22 of-Figurel; I Figure 3' is a plan of the; trip device, partly broken away;

Figure4 is a section on-line 4 4 of Fig-j hrs 3 and Figure 5 is asection on line 5-5 of Fig ure.

Referring to the drawingspthenuineral 1O designates an excavator scoop"which may i be operated by suitable excavator mecha nism such as thehandle ll geared to'a track- 12 and operable by a crowding line 13 anda' hoisting line 14 coiled on drums mounted on shaft 15 which is drivenby 'a prime mover 16 all mounted on a deck 17 on a tractor or othervehicle 18, the excavator control levers being arranged at an "operatorsstation at 19. Thetrip of the present 1 invention is adapted for use inany type of" excavator, only one known type, beinghere in illustrated. iI

The scoop 10" herein" shown opensat its? rear end'20, a suitable latch2l for holding it shut being arranged tobe tripped by lever 22to whichis connected a trip line 23 extended over suitable uide pulleys seas and26 mounted on the rame of the excava tor to a drum 27. 7

Drum 27 is journaled' o nfa shaft 28, which I latter is journaled insuitable brackets '29 and 30 and is arranged to be driven from" theshaft 15 by a s rocket 31 securedion shaft 28 and over wlE' ich istrained a drive chain 32 driven 'by a'sprocket 32 on shaft 1 5. Formaintaining the line 23 taut, suitable yielding means, such as a coilspring .33,

effective on drum 2'? so as to tend to wind line 23 onto the drum.

Actuation of drum 27 is provided for arranging on shaft 28 a friction.clutch ineluding a-mem'ber 34 secured on the shaft, and a member 35shiftable thereon, and mounting on member 35 an element such as a pin 36for positively engaging teeth 37,37 on drum 27, pin 36being springmounted to be retractile sor that should it at any time moveinto'engagement with the top of a tooth 37, it will ride'over the sameand into engagement with a succeeding tooth, This arrangementprovldes avfricf tion clutch for assuming the initial load occasioned by throwingthe trip in operation and relieves this load from the positive pin andtooth engagement, the heavy initial load being absorbedby the clutch. V

I To the end that the line 23 will be pulled .a'predetermined requireddistance to effect a scoop tripping operation, clutch 'member I 35carries a cam 38' arranged co-engage a fixed cam plate 39 arranged in;the path thereof and designed to shift member '35 out of engagement. 7Also to prevent operation of the trip mechanism in the wrong directionby inadvertent engagement of the clutch when drum 27 is'rotating duetopulling action online 23 as the scoop handle is being moved, a cam 40 isarranged on clutch member 85 and a fixed cam plate 41 is ar- -reng d fit '30 path, thereof to disengage the Clutch. 1 i I a In order'that thepin 36 will be properly reset after each tripping operation, suitable Vyielding means may be provided for return-,

ing the clutch member 35 toan' initial angular position. [In theparticular embodiment j shown, the clutch member on that side on link46,

which thepin is mounted is heavier and,

in addition, a retrieving spring 42 maybe connected to the clutch member35.

,The clutch member'35 is arranged tobe controlled froin-theoperativesstation by means of a shifting yoke 43 in'arock shaft 7 44: extendingtothe station 19- and having an operating arm t thereon arranged to beoperated bya foot pedal 45 through a "In use, when the scoop 10 has beenactuated to-a dumping elevation, such'as 'indi-' jcatedln dotted linesin Figure 1, the pedal 45 is depressed'to engage clutch member whichengages pin 36 with a tooth 37 on drum, 27 and positively rotates thedrum 27'counter-clockw1se, the amount of this ro- 'tation beingdetermined by the knock-out ,cani39 and varying on succeeding operationsnot more than the distance between i member'35 throws cam40 against camplate '41 which may have abumper 4C1 thereon two teeth 37. Upondisengagement of the clutch member, 35, its unbalanced weight and spring42 retrieve it, returning it to its initial position as shown, in fulllines in Figure 4., The retrieving action on clutch to absorb the shock.

" eI 'is. to be 'i oted that by the provision of a positive clutchingconnection between the shiftable knock-out clutch member 35 and the drum27, the latter may normally rotate freely to pay out or take in thetripping cable during actuation ofrthe' shovel, but nevertheless it isactuated "through a predetermined angle for tripping, this angle'be ingonly slightly variable dependingupon the spacing of theteeth 37. V

'Modifications-of the invention may be re- W Vhat is claimedis 1. Apower-operated trip for excavators comprising a trip line extending tothe scoop of the excavatona drum upon which the trip line is reeled,yieldingmeans effective on the drum to maintain the line taut,"v a shaftadapted to be driven by the prime mover of the excavator, said drumbeing freely journaled on said shaft, a friction clutch member securedto said shaft, ashiftthereof or thescope of the appendedclaims ablefrictionclutch member journaled on the shaft and arranged to cooperatewith :the first clutch member, means operable "by said sorted to withoutdepartmg from the spirit shiftable clutch member for positively rotatingthe drum, 'sald means including a retractile pin on'the shiftable clutchmember means effective on the shiftable clutch nember for normallyurging said member to an initial angular position, means for(llSGngigingsaid shift-able clutch member after a predetermined angulartravel thereof, said means including a .cam on said shiftable clutchmember and a fixed cam plate ar-. ranged in the path of said cam,andfmeans and circumferentially spaced teethon the i i i drum arrangedto be engaged by said pin, V

for controlling the shiftable clutch member fromthe operatives stationon the excavator. f

2. A power-operated trip for excavators comprising a trip line extendingto the scoop, of the excavator, "a drum upon which the trip line isreeled, yielding means effective on the drum to maintain the line taut,a

means effective on the shift-able clutch memberfor normally urging saidmemberto an and circumferentially spaced teeth onthe drum arranged to beengaged by said pin,

initial angular position, means for disengaging the shiftable clutchmember after a pre 7 means for controlling the shiftable clutchdetermined angular travel thereof, and, V

member from theoperatives station on the excavator.- 1

3. A power-operated, trip for" excavators comprising atrip, lineextending to the. scoop of the excavator, 'a 'drum upon which thetrip'lineis reeled, yielding'means eifective on the' drum -to-maintain*the line taut, a

shaftadapted to be drivenby the prime mover'of the excavator, said drumbeing freely journaled on" saidffshaft, a friction clutch member securedto said shaft, a shiftable friction clutch memberjournaled on the shaft,and arranged to cooperate'with the first clutch member, means operableby said shiftable clutch member for positively rota'ting the drum, meanseffective on the shiftable clutch 'member for 1 normally urging saidmemberto an initial; angular position,

" clutch member from means for disengaging said shiftable clutch memberafter a predetermined "angular.

travel "thereof, said means including a cam on said-shiftable clutchmember ay-fixed cam plate arranged in: the path of said cam,

and "means for controlling the shiftable the operatives' station 7 Iable clutch member for normally urging said member to an initialangular'rposition, means for disengaging said shiftable clutch-man herafter a predetermined fangular travel thereof, and means for controllingthe shiftable clutch member; from'the operatives station'on theexcavator.

,5. A power-operated {trip for excavators comprisinga trip li neextending to the scoop of the excavator, 'a'drum upon whichtheitripline. is reeled, yielding means effective on the druin 'to maintain] theline taut,-flashaft adapted to bedriven bytheprimeimover oftheiexcavator, said drum "being freely jourinaled on said shaft, a}friction clutchmember secured to said 3 shaft, a shiftable frictionclutch member journaled oirthe shaft and arranged to cooperate,'With'thefirst clutch member, means' operable by said shiftable clutch memberforfpoisitively rotating "the druinQsaid means! including a retractilepin on the "shiftable elutch l member and circumferentially spaced teethfion the drum 'arranged to be engaged bysa id pin, and means for"controlling the fishiftablje clutch member from the operatives stationonfthe excavator.

1 A a comprising a trip line extending to the scoop of the excavator, adrum upon which the tripline is reeled, yielding-means effectivepower-operated trip for excavators i on the drum to maintainthe linetaut, a

shaft adapted to be driven by the prime mover 'of the excavator, saiddrum being freely "j ournaled ,on' said shaft,,.a clutch member securedtoisaid shaft, ashiftable clutch member journaled on the'shaft andarranged to cooperate with the first clutch member, means effective onthe shiftable clutch member for normally urging said member to aninitial angular pos1t1on,means for dlsengaglng said shiftable clutchmember after a predetermined angular travel thereof, 531d meansincluding a camon said shiftable clutch member and a fixed cam vplatearranged in the path of said cam, and 'me'an's for controlling theshiftable clutch member from the operatives station 'on the excavator;

.7. A power-operated" trip for excavators comprising a trip lineextending to the scoop of 'the excavator, a drum uponwhich the triplineisre'eled, yielding'means er, Y

fective on the drum to maintain the [line taut, a shaft adapted to bedrivenfby the prime mover .of the excavator, said. drunfi being freelyjournaled on said shaft, a friction clutch member securedto saidshaft,ja"shift:-

able 1 friction clutch member journaled on; the shaft and arranged tocooperate With the first clutch member, means operable by said shiftableclutch member for] positively rotating the drum, and means for cgntrol-Yling the shiftable clutch member' from-the operativesstation on theexcavator;

8. power-operated trip for excavators comprising a trip line extendingto the scoop of the excavator, a drum upon which the trip line'isreeled, yielding means effec tive on the drum to maintain the line taut,a shaft adapted to-be driven by the prime mover of the excavator,saiddrum being freely journaled on said shaft,; a. clutch member securedto said "shaft, a shiftable clutch member journaled "on the, shaft andarranged to cooperate 'With' the first clutch member, means effective onthe shiftable clutch member for {normally urging" said v member to an1n1t1al angular, pos tion, means for disengaging said shiftable clutchmember aftera' predeterminedan gular travel thereof, and means forcontrollingthe shiftable' 'clutchmember from station 'ontl1eexcavator.

9. povveroperated for excavators, 's id trip eomprisinga trip lineextendin'gto the excavator scoop, a drum ojn which said line, is reeled,and means for operatingthe drun comprising driven"shaft, a com. binedfriction and positlve clutchfor conthe operatives necting said shaftto'said drum whereby the load; applied by the shaft by shifting the clutchinto engagement is assumed in the main by the friction means, the loadbeing relieved from the positively engaginggelements," and means forpositively disengaging theclutch from-the shaft and drumafter apredetermined angular "travel of the drum.

'10; A power-operated trip for excavators,

said trip comprisinga trip line extending to the excavator scoop, a drumon whlch I said line is reeled, and means for operating Y relieved fromthedrum comprising a driven shaft and a combined friction and positiveclutch for connecting said shaft to said drum,whereby the inertiaload'occurring when "the clutch is shifted into engagement is assumed inthe main by the friction means, this load being the positively engagingele' mentss 111. The combination in a power drive for excavator trips,of a trip line, means for pull ng the tripelme, a' rotating member foractuating the pulling means and means for connecting the pulling meanstothe member.

7 for a tripping operation comprising'a come bined friction and positiveknockout clutch for providing a frictional'connection thereof to therotating member and a positive connection to the pulling means.

12 The combination ina power drive for excavatortrip's, of a trip line,means for pullingthe trip line, a rotating member for actuating thepulling means, and means for connecting the pulling means to the memberfor a tripping operation comprising a 7 combined friction and positiveclutch for providing a frictional connection thereof to the shaft and apositive connection thereof necting the pulling means to the member foratripping operation comprising a knock out: clutch adapted to beself-disengaging *afterfa predetermined travel thereof, said clutchbeing normally 'disconnect'ed' rfrom said rotating memberand from saidpulling means, and means for actuating said clutch toconnect saidrotating member and said i V is actu ated a predetermined distance bysaid pulling meansywhereby said pulling means rotating member throughsaid clutch.

:14. Thercombination in 'an'excavator of r V V a trip device including.atrip line, aidrum onlwhich the trip line reels, and means for I aactuating the drum including means efi'ective on the drum for causingthe line posi- 'tively to travel a predetermined distance "Withinpredetermined limits, said means i'n-j eluding a clutch, interengagingmeans for; 7 e p adapted to payout Ontakein'the trip line,},

' positively connecting the clutchy'to" said drum and frictionrmean sfor connecting" the V I retrieving the line.

ing the line.

15. The combination in an excavator, of

a trip device including a trip line, a drum on which the tripline reels,and means for actuating the drum including positive means;

effective on the drum for, causing the; line positively to travel'apredetermined distance o -'75 member and friction meansfor connect ng 7within predetermined limits, a power driven the positive means to saidmember for rotation through "a predetermined angle, and

means effective on the' dru'm for yieldingly 16. In a power-operatedtrip control de vice for excavators, a driven member, a trip pullingmember,and meansfor connecting the trip pulling member to vthedriven menher, said means including relatively movable members comprising aknockout friction clutch having means on one member ,for

positively engaging the pulling member, and

means for normally urging the said-member of the clutch to an initialangular position from which it may ber; r r V I v 7 17. The combinationin an excavator of 'a' power-operated scoop trip line actuating-mechan1sm includ ng adriven shaft; and a clutch on the shaft normallyoperable into engagement at one angular positionand out of engagement atanother angular position to effect a predetermined travel'of the linefor tripping the scoop. e

18. The combination'in an excavator of a power-operated scoop triplineactuating mechanism; including'a driven shaft and a clutch on theshaft normallyoperable into engagement at one angular position and outoperate the pulling'mem engagement at another angular position to feffect a predetermined travel of the line for tripping the scoop,said'clutch having both frictionally and positively engaging meansthereon for actuting said mechanism, thefrictional means for connectingthe clutch to the driven shaft and: the positive means for connectingthe clutch to the line,

' 19, Ther'combinationinan excavatorof a power-operated scoop trip lineactuating fmechanism including a drive shaft, a trip lit) line pullingdeviceadapted to be operated thereby 'vvhenro tating in one direction,and

a clutch onthe shaft for operatingsaid'device, said clutch havingmeans'thereon for automatically disengaging the clutch Qmem bers afteractuation'of the tripline; a pre- 7 determined; distance and also meansthereon for automatically disengaging the clutch; members if they areengaged when said v drum. is operating in the other direction 1 [20. Ina'power. operated trip, a :tripline; and operating dru mtherefornormally iso' j: v

iththe drum, a knock-out clutch for connecting the power means to thedrum, said clutch including engageable friction mem bers and means onone of said members and 'the drum by said clutch," said drumnorcooperating means on the drum for rotating mally being free of theclutch.

21. Ina device of the character described,

' and in combination With a power shovel having" a power driven shaftand adipper trip'rope, a drum for said rope, means-for selectivelyconnecting said drum with said power shaft to Wind said rope on saiddrum, and means for automatically disconnecting said drum from saidshaft after limited rotation thereof. w

' GEORGE E. WAGNER.

LE ROY P. GLUTTER.

